03.44: A circular parallel-plate capacitor is connected to a baz1 lt-jo;g i.ettery in a circuit. The capacitor is fully charged before the battery is disconnected from the circuit. A ut. gj-l;i ez1oniform material of dielectric constant $κ$ is inserted between the plates of the capacitor, effectively filling the space between the plates. Let $U_old$ be the energy stored by the capacitor before the dielectric was inserted, while $U_new$ is the energy stored after the dielectric was inserted. The ratio of $U_new/U_old$ is

  11.42: A parallel-plate capacitor of capacitance C has a l;hnq* 3up3o*ld-cgf n insulating dielectric material of constant K filling the entire region between its plates. This capacitor now is connected to a battery of voltage V and is fully charged before the battery is disconnected. The capacitor stores energy U. Using insu o;- glp*ldcfhn*uq 33lating gloves, a person now removes the dielectric from the capacitor. After equilibrium is established following the removal of the dielectric, which one of the following choices best represents the energy stored by the capacitor in terms of U?

  14.47: An air-filled parallel-plate capacitor of capacitance C is fully chx7rb 6r;av.d a: zm g(i;pnp9narged after being connected to a battery of voltage V. The battery then is disconnected and an :d6v9nr a.g n ;pm7;pb(ziarxinsulating dielectric slab of constant K is inserted between the capacitor’s plates, fully filling the region. What is the voltage between the plates once equilibrium is established with the dielectric in place?

  15.45: A 6.00 μF parallel-plate capacitor is brn1v2 y;cuozmt7 6l v1qfm 57disconnected from a 12 volt battery after being fully charged. A person now cyq6nt5z 7c1l;b 2vm7r1v u omfarefully inserts a dielectric material of constant K= 2 so that it fills one-half of the space between the plates as shown. How much work was done by the person while inserting the dielectric?